Side frame



M 'H. MARTIN S IDE FRAME Filed Jan. 27, 1952 xllll MUN iff@

i'atentecl Sept. 25, 1.94314I Mi iii'viiiiiiii iiiiiei i@ ,siii fiiniesiiiepirtaiiio iiai'ticularly td the type fof frameldisclosed in Vtide increased i'ding" [u r Wed is reduced i9 e. minmiiriii- -i i further dbjebtjis tinie :provisiongof a'wside wnieiiiiiei n l nf a faeieijiaiy'- in meerv it preme iiiaxiiiiuin; sirne-enana .i `(if iineiiifiiiitgh indiening ofv me iinef ain asien ef iii@ inemimposed thereon in excess of those norndaih ing the general arrangement of asuggestedform of `spring groupingand-the1atters relation to the i widened portion of` the spring seat portion of the lfflew i .ci Fig. 3 is a section alongthe line 3--3 inFig.e1',

in*- ,dottedoutline,l f ,i Y Figs'.y 4,151: and' 6 are sections along the: lines 41-4: 5*-5, and' 6 63` respectively, looking in .theu 5-` direction of the a'rrovvsfyand` illustrating certain'= in` sier" and a diagrammatic rep-j looiiirgl in the direction ofte arr'ojis', andsnowtions aiii t ine indicated por; iiiel n E ,i v Y to' tnx dryng, the numerario desir igriazes ine-side 1trarne ,which is provided witntiie 18' isproiided with" the downwardly' extending side W'ailrs 25 denne' the channel section illi'isiiajtd'ii Figi! 6', the 1`Wr dg'esA of said Side i Walls' b''in'g provided viitli'the reentrant flanges" 2er- The endszofiiiri'e sia waiiszjs are iag'erd as looking in the direction o'f the arrows, the bolster, A sprngplankand springI grouping being;A indicated.

Y providing additional strength in, ythat portion of walls 25. Gusset webs 29 project laterally from the side walls 25 and provide reenforcement for the underside of the shelves 19, while between the side walls 25, additional gusset webs 30 may be provided to further strengthen the horizontal web 18, the vertical axial planes of the inner and outer springs being common with the vertical planes through the webs 29 and 30.

One of the principal features of the present invention resides in the adoption of devices for suiciently strengthening that portion of the side frame beneath the bolster opening in order to adequately support the increased loading that would be transferred by a spring nest of the character indicated and these means are preferably in the form of ribs 31 which are integrally formed with the side walls 25 and which face inwardly toward each other. These ribs preferably extend from the ends of the web 28 upwardly to substantially the junction of the diagonal and horizontal vweb portions 1'7 and 18, respectively, the rib 31 being substantially a continuation of the diagonal web 17. Accordingly, the tensile stresses which are created in the lower web 28 are carried directly through the ribs 31 to the web 17 without dependence entirely on the side walls 25, thereby greatly increasing the strength and stiiness of the spring seat portion of the frame.

In the frame of the foregoing construction, the web of the tension member 12, including the diagonal and horizontal portions 17 and 1 8, respectively, is located in positions that conform most naturally to the conditions imposed by the applied load and which resist Inost'effectively the resulting stresses. Since the line connecting the neutral axes of the sections is relatively close to the theoretical line of least bending strain in the tension member, distorting possibilities Aare reduced to a minimum, so that the member may be formed with less metal without sacrifice of strength than is possible in constructionswhere the webs of the diagonal members join the bottom webs of the box sections comprising the bottom tie member of the frame. going improvements have been embodied in a frame which is susceptible of being readily cast in accordance with sound foundry practice.

While I have shown one set of elements and combinations thereof 'for effectuating my improved side frame, it will be understood that the same is intended for purpose of illustration only and in no wise to restrict the same to the exact forms and structures shown, for many changesV may be made therein without departing from the spirit of my invention.

I claim:

1. A side frame having a tension member comprising a horizontal web forming a spring seat portion and diagonal webs joining said horizontal web to the compression member of the frame, all of the webs together forming the principal web element of v the tension member, said diagonal webs having upwardly extending anges and said horizontal web having downwardly extending side ilanges, the central portion of said side flanges being connected to form a box section having a horizontal lower web whose ends terminate at points in substantial alignment with the diagonal webs extended, and strengtheninggmeans extending from substantially the junction of said horizontal and diagonal webs downwardly to the end of the lower web.

2. A side frame comprising a tension member having a horizontal Web forming a spring seat portion Yand diagonal webs joiningsaid horizontal All of the foreweb to the compression member of the frame, all of the webs together forming the principal web element of the tension member, said diagonal webs having upwardly extending ilanges and said horizontal web having downwardly extending side ilanges, the central portion of said side anges being connected to form a box section having a horizontal lower web whose ends terminate at points in substantial alignment with the diagonal webs extended, and strengthening ribs integral with said downwardly extending anges extending from substantially the junction of said horizontal and diagonal webs to the ends or the lower web. Y

3. A side frame having a tension member comprising a horizontal web forming a spring seat portion and diagonal webs extending continuously from said horizontal web and connected to the compression member of the frame, all of said webs together being formed substantially as a catenary, said diagonal webs having upwardly extending ilanges and said horizontal web having downwardly extending side anges, the central portion of said side anges being connected to form a box section having a horizontal lower web whose ends terminate at points in substantial alignment with the diagonal webs extended, and strengthening means extending from substantially the junction of said horizontal and diagonal webs downwardly to the ends of the lower web. l

4. A side frame having a window opening and a tension member having a substantially horizontal web portion dening the bottom of said opening and havingv continuously formed, diagonal web portions connected to the compression member of the frame, all of said portions together be- Y ing arranged substantially as a catenary, said horizontal web portionhaving downwardly extending flanges, the central portions of said side flanges being connected to forma box section having a horizontal lower web whose ends terminate at points in substantialalignment with the diagonal webs extended, and strengthening means extending from substantially the junction of said horizontal and diagonal web portions downwardly below'said horizontal web to ends of the lower web.

5. A side frame comprising a tension member having a horizontal web forming a springv seat portion and continuously formed, diagonal webs joining said horizontal web to the compression member of the frame, all of said webs together being arranged substantially as a catenary, said diagonal webs having upwardly extending anges and said horizontal web having downwardly extending side anges, the central portion of said side anges being connected to form a box section having a horizontal lower web whose ends terminate at points in substantial alignment with the diagonal webs extended, and strengthening ribs integral with said downwardly extending anges extending from substantially the junction of said horizontal and diagonal webs to the ends of the lower web.

-6. A side frame having a tension member comprising a horizontal web forming a spring seat portion and diagonal webs joining said horizontal web to the compression member of the frame, all of the webs together forming the principal web element of the tension member, saidl diagonal webs having upwardly extending anges and said horizontal web having downwardly extending side anges, the central portions of said side flanges being connected to form a box section having a horizontal lower web, and strengthening means extending from substantially the junction of said horizontal and diagonal Webs in alignment with said diagonal webs downwardly to the ends of said lower web.

7. The combination of a side frame comprising compression and tension members spaced at intermediate portions thereof by bolster columns leaving a window opening therebetween, said tension member comprising a horizontal web forming a spring seat portion and diagonal webs connected to the compression member of the frame, all of said webs together constituting a continuous element arranged substantially as a catenary, said diagonal webs having upwardly extending anges and said horizontal web having downwardly extending side flanges, the central portions of said side flanges being connected to form a box section having a horizontal lower web whose ends terminate at points in substantial alignment with the diagonal webs extended, shelves extending laterally from said horizontal web to provide a spring plank seat, gusset webs extending from said shelves downwardly along said side flanges, strengthening means extending from substantially the junction of said horizontal and diagonal webs downwardly to the ends of said lower web, and a nest of truck springs carried by said frame arranged in inner, outer, and intermediate groups, the vertical axial planes of said inner and outer groups being common with the vertical planes through said gusset webs and said intermediate group being disposed over said box section.

MARK H. MARTIN. 

